Troxler errors in an excavation
Troxler errors in an excavation
(OP)
Can anyone provide a resource for defining safety and accuracy aspects of this equipment.
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Troxler errors in an excavation
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RE: Troxler errors in an excavation
RE: Troxler errors in an excavation
RE: Troxler errors in an excavation
The information you probably will not find are the fine details of operating the gauge, like "When do you use trench offset?", etc.
RE: Troxler errors in an excavation
It really isn't rocket science. There are two seperate radiation sources. One in the tip which can be extended into the ground. This sources measures total density. The other source is in the body which measures moisture. Both recivers are in the body. To test an area, a pin is driven slightly past the depth to be tested. The pin is removed and the tip is inserted to the depth to be tested. The average total density between the tip and the body is measured. The Moisture in only the top 2-3 inches is measured (the depth of measurement of the moisture is affected by the amount of moisture.) The macines then computes the effecitve density from the total density and the moisture content. The machine can compute total density in what is called the back scatter mode. In this mode the tip does not extnd out side the body of the machine. The total density is based on reflected radiation and only measures a few inches of depth. This mode is used for paving, but is not verry accurate for earthwork. yet, because it is easier and faster, I have seen it done more than once on earthwork jobs. Other factors that can affect accuracy is the side walls of a trench or certian soil types can in rare instances cause inaccurate readings.
Although you do need a one day training class to be certified to operate a Troxler gauge, you don't need to attend a class to understand how it operates and how to interpret the results. Troxler should be able to get you literature on this or it may even be available on the web. (I didn't look)
Good Luck!
RE: Troxler errors in an excavation